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High Gh And Kh ?

Discussion in 'General Plant Topics' started by yusuf saraç, Apr 14, 2018.

  1. yusuf saraç

    yusuf saraç New Member

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    Do you guys think my GH and KH is too high ? I believe they are. If so what do you recommend to make it optimum

    20180414_234823.jpg
     
  2. Phishless

    Phishless Lifetime Member
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    This would depend on what plants you are growing?

    Lower by mixing with RODI or all RODI re-mineralized to your liking with GH booster etc...

    What does your tap water look like?
     
  3. yusuf saraç

    yusuf saraç New Member

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    I measured my top water and it looked okay to me. I attahhed the picture of top water numbers. I'm injecting diy co2 and diy ferts. One thing that I'm using Magnesium nitrate - Mg(NO3)2 as my nitrate source. Does it have a chance to increase the gh and kh levels becouse of having Mg in it ?

    20180415_114450.jpg
     
  4. Phishless

    Phishless Lifetime Member
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    Mg will add to GH.
    If you only top off the tank and add ferts this can accumulate very quickly.
    How frequent do you change water?
     
  5. yusuf saraç

    yusuf saraç New Member

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    I fill the top every week. And other week I make 40% water change. So Water changes are every 2 weeks.
     
  6. Allwissend

    Allwissend Article Editor
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    The large increase in GH is because of Mg added as @Phishless suggested. Topping up with tap contributes to both GH and KH, and is likely the main reason for the increase in KH.
    If you cannot use KNO3, try and combine Ca(NO3)2 with Mg(NO3)2 and use only Reverse Osmosis water for your water changes. If this does not work, urea would be a last resort type of thing. Just ask before starting to dose it.
     
  7. yusuf saraç

    yusuf saraç New Member

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    Thank you for the answers guys. It seems that will solve the gh - kh problem. So what I want to know is what happens when I have this high amount of GH and KH ? My plants are not doing good. I have always some old leaves turning yellow and melting. (s repens, pogostemon helferi and even micra) And I'm adding little no3 ( as Mg(NO3)2 ) but 2,3 days later no3 levels seem to be the same. Looks like my plants don't taking it as much. I dont have any other important no3 source / live stock.

    So does it can be because of the high GH - KH levels ? and what is the optimum gh - kh levels for high-tech planted tank ?
     
  8. Allwissend

    Allwissend Article Editor
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    There are very few plants that absolutely need soft water. The tap water you have is not that bad really. High GH means you have high Mg and/or Ca in the water. High KH means you have high bicarbonates in the water. In one aquarium, I am currently growing all the plants you listed in water similarly to what you have in your aquarium (in terms of KH and GH) with no major problems... except they need a massive trim :) Using chelated micronutriens helps. So, high KH and GH are most likely not the cause.

    Most would aim for a GH of 6 and a KH of 3 as a good starting point. What is optimal is up to the specific aquarium to say.

    What is the actual dosing like ?
     
  9. edwardsmith

    edwardsmith Lifetime Members
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    (Disclaimer: I'm a newbie): I'm on well water and had high KH (15) and GH (15). I selected hardy plants that preferred harder water, but my plant choices were limited. I switched to 50/50 RO/well water to add discus (not for the plants) and the results, on the plants, were terrific. Grew faster, more colorful and now I have a wider ranges of plants to choose from. Thanks
     
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